Septic businesses in Illinois
As of October 29, 2026, DealFlow OS tracks 162 septic service businesses in Illinois, compared with 83 establishments with paid employees in the U.S. Census Bureau's 2022 County Business Patterns.
Updated
Septic businesses
162
With a website
83%
With a phone number
99%
Build the Illinois septic list
Open the Deal Finder with Septic and Illinois prefilled — same 162 count, phone and website on every row.
Spread across 121 cities and towns
No single city has 5 or more — top counties:
- 1.Cook County11
- 2.McHenry County11
- 3.DuPage County10
- 4.Will County8
- 5.Kane County6
Compared with the Census
- DealFlow OS (October 29, 2026)
- 162
- Census CBP 2022 (NAICS 562991)
- 83
NAICS 562991: Septic tank and related services.
Source: U.S. Census Bureau, County Business Patterns 2022 — excludes sole proprietors (non-employer businesses).
Frequently asked questions
How many septic service businesses are there in Illinois?
As of October 29, 2026, DealFlow OS tracks 162 septic service businesses in Illinois, compared with 83 establishments with paid employees in the U.S. Census Bureau's 2022 County Business Patterns. Source: U.S. Census Bureau, County Business Patterns 2022 — excludes sole proprietors (non-employer businesses).
What share of septic service businesses in Illinois have a website or phone number?
83% of the 162 septic service businesses DealFlow OS tracks in Illinois list a website and 99% list a phone number.
Where in Illinois are septic service businesses located?
They are spread across 121 cities and towns — no single city has 5 or more. Top counties: Cook County (11), McHenry County (11), DuPage County (10).
Why is the DealFlow OS count different from the Census number?
County Business Patterns counts establishments with paid employees and excludes sole proprietors (non-employer businesses). DealFlow OS counts septic service businesses found in public business listings, including owner-operators without employees.
How do I get a list of septic service businesses in Illinois?
Open the Deal Finder with Septic and Illinois prefilled to see the same 162 count, preview the rows, and export the list with phone numbers and websites.
Septic in other states
Other industries in Illinois
Thinking about buying one? How to acquire a septic service business · Septic by state